Updated the Python scripting shim to expose EAT_HEXCHAT as an alias of EAT_ZOITECHAT, so scripts written for HexChat constants work without changes.

Added a Python hexchat.py compatibility module and ensured it is installed alongside zoitechat.py/xchat.py, enabling import hexchat scripts to run.

Updated the Perl API layer to support HexChat naming by aliasing HexChat:: to ZoiteChat::, adding EAT_HEXCHAT to exported constants, and adding an explicit Perl shim module HexChat.pm.

Extended Perl XS constant registration to export EAT_HEXCHAT as a compatibility alias, and wired HexChat.pm into the embedded Perl module generation list so it ships with the plugin.

plugins/python/hexchat.py

@@ -0,0 +1 @@
+from _zoitechat import *